Finite element analysis study of parameters influencing the Poisson's ratio of auxetic woven fabrics.

Auxetic textiles, as one of the synthetic auxetic materials, have attracted much research interest in recent years due to their material adaptability and structural variability. Based on the experimental results reported in our previous papers, the auxetic behavior of woven fabrics was further investigated and the key factors affecting weaving the fabrics were studied systematically by using a combination of experiments and numerical simulation. In this paper, different types of woven fabrics were compared based on finite element analysis and the key parameters influencing the Poisson's ratio were analyzed, including the helical auxetic yarn (HAY) arrangements, fabric density, helical angles of the HAY, thickness of the HAY, weave structures, warp yarn types and loading directions. The auxeticity of the fabrics was first analyzed out-of-plane and in-plane. The results showed that the maximum negative Poisson's ratio can be achieved as −3.57 out-of-plane and −1.17 in-plane. The out-of-plane auxeticity of the fabric is notable, which could provide a reference for industry and researchers for potential applications. [ABSTRACT FROM AUTHOR]